A sheet carrier device includes a sheet carrying passage, roller pairs, a sheet detection device, and a control device. The sheet carrying passage includes a part configured as a drawable drawer device. The roller pairs carry a sheet along the sheet carrying passage. The sheet detection device detects whether there is the sheet which is being carried along the sheet carrying passage. The control device determines whether there is the sheet located in a tearing jam place between the inside and the outside of the drawer device at a time point at which a jam occurs on the basis of a result of detection from the sheet detection device and performs a tearing jam releasing process of removing the sheet from the tearing jam place when it is determined that there is the sheet.

An image forming apparatus includes a first sheet stacking portion, a second sheet stacking portion, an image forming portion, and a sheet feeding portion. A bottom part of a feeding passage connecting between the second sheet stacking portion and the sheet feeding portion is configured with a conveyance guide movable up and down. The conveyance guide includes a tray body portion in the shape of a flat plate and a handle portion. With the first sheet stacking portion mounted in the apparatus body, the tray body portion is held on the apparatus body above the first sheet stacking portion. The handle portion protrudes from an upstream end part of the tray body portion in the sheet conveyance direction and is pivotable in the up-down direction.

An image forming system includes: an image forming apparatus that forms an image on a recording medium; a relay transporter that transports the recording medium on which the image is formed by the image forming apparatus; a post-processing apparatus including a collecting container that collects a recording medium, the post-processing apparatus performing post-processing on the recording medium transported by the relay transporter; and at least one processor configured to stop transport of a recording medium when a paper jam occurs in the post-processing apparatus and, if a remaining recording medium is present in the relay transporter when the paper jam is cleared and the transport of the recording medium is restarted, cause the remaining recording medium to be collected by the collecting container.